教学目的１ 通过本课教学 ,使学生理解风的成因。２ 通过对风的成因的探究 ,培养学生的实验能力和理解能力。３ 渗透“自然界的物质是变化的 ,变化是有规律的”科学观点。教学重点、难点重点 :使学生理解风的成因。难点 :指导学生设计风形成的模拟实验。教学准备学生分组实验材 Teaching Objectives 1 Through the teaching of this lesson, enable students to understand the causes of the wind. 2 through the exploration of the causes of the wind, to develop students' ability to experiment and understanding. 3 Permeation “matter in nature is change, change is a regular” scientific point of view. Teaching Focus, Difficult Points: Make students understand the causes of the wind. Difficulties: guide students to design the formation of wind simulation experiment. Teaching preparation Students group experimental materials